Solve the problem.A lumber yard has fixed costs of $2682.80 a day and variable costs of $1.00 per board-foot produced. The company gets $2.90 per board-foot sold. How many board-feet must be produced daily to break even?
A. 941 board-feet
B. 687 board-feet
C. 1412 board-feet
D. 2682 board-feet
Answer: C
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Solve the problem.A window is in the form of a rectangle surmounted by a semicircle. The rectangle is of clear glass, whereas the semicircle is of tinted glass that transmits only one-fifth as much light per unit area as clear glass does. The total perimeter is fixed. Find the proportions of the window that will admit the most light. Neglect the thickness of the frame.
A. 
= 
B. 
= 
C. 
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D. 
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Solve the problem.A long distance phone company offers a promotional deal for the first month of service. They charge $15 basic fee for the month which includes 600 free minutes. Each additional minute costs $0.05. If Joe subscribes to this plan, how many minutes of calls can he make while keeping his total cost to no more than $42?
A. at most 540 min B. at most 1140 min C. at most 1040 min D. at most 1460 min
An efficiency study conducted for a company showed that the number of devices assembled by the average worker t hr after starting work at 7 A.M. is given by
?
?
At what time during the morning shift is the average worker performing at peak efficiency?
?
A. At 9 A. M. the average worker is performing at peak efficiency. B. At 10 A. M. the average worker is performing at peak efficiency. C. At 7 A. M. the average worker is performing at peak efficiency. D. At 8 A. M. the average worker is performing at peak efficiency.
Solve.0.4x3 - 1.6x2 - 3.2x + 3.2 ? 0
(Round to three decimal places when necessary.)
A. [0.764, 5.236] B. [-2, 5.236] C. (-?, -2] ? [0.764, 5.236] D. [-2, 0.764] ? [5.236, ?)